his passenger teammate jerry brown died. brent did plead guilty to driving under the influence three years ago. an experimental cancer treatment that works in adults is showing equal promise tonight in children. the treatment pioneered by university of pennsylvania researchers uses a patient's own immune cells to kill the cancer. in an ongoing test of 10 adults and two children with advanced leukemia nine of the patients are responding positively including both children. elaine quijano has more. >> reporter: two years ago emily whitehead was just five when her mother carry felt something was wrong. >> i noticed one evening when i was giving her a bath that she had a lot of black and blue mark its all over her body. >> emily had all, acute lympho blass particular lieu keep ya, curable in 85% of children who undergo chemotherapy. >> but for emily, chemo didn't work. she thinks her dog lucy knew it first when her cancer came back. >> she wouldn't play with me, she would just sit. >> do you think she knew you were sick. >> yeah.